I/O Ports and Connectors
147
Figure B-2.
Serial Connector Pin Numbers
Parallel Connector
The integrated parallel connector, intended primarily for use by printers that require data in
parallel format, uses a 25-pin D-subminiature connector on the system's back panel. The default
designation of the system's parallel connector is LPT1. If you add an expansion card containing a
parallel connector configured as LPT1 (IRQ7, I/O address 378h), use the System Setup program to
remap the integrated parallel connector. See "Using the System Setup Program" in the
User’s
Guide
. Figure B-3 illustrates the pin numbers for the parallel connector and Table B-3 defines the
pin assignments for the connector.
Figure B-3.
Parallel Connector Pin Numbers
Table B-2.
Serial Connector Pin Assignments
Pin
Signal
I/O
Definition
1
DCD
I
Data carrier detect
2
SIN
I
Serial input
3
SOUT
O
Serial output
4
DTR
O
Data terminal ready
5
GND
N/A
Signal ground
6
DSR
I
Data set ready
7
RTS
O
Request to send
8
CTS
I
Clear to send
9
RI
I
Ring indicator
Shell
N/A
N/A
Chassis ground
Содержание PowerEdge 1800
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